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2,111
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Media Type
1,747
texts
170
audio
122
movies
35
data
34
images
2
web
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Topics & Subjects
573
Engineers
401
ENGINEERS
397
ERIC Archive
348
NASA Technical Reports Server (NTRS)
267
DTIC Archive
217
Scientists
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Collection
478
American Libraries
397
Education Resources Information Center (ERIC) Archive
348
NASA Network Resource and Training Site
267
Defense Technical Information Archive
148
Community Audio
94
California Digital Library
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Creator
397
eric
348
nasa technical reports server (ntrs)
267
defense technical information center
58
9/11 free fall
35
united states. army. corps of engineers
30
keith, hastings, 1915-2005
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Language
1,760
English
24
French
9
Italian
6
Russian
5
German
5
Spanish
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